APPENDIX. 



347 



ized cages, because insects are sometimes subject, to contagious diseases 

 which are very fatal, 



Figure 361. General view of an insetary. 



Where practical a good plan is to cage the insect under rormal conditions 

 as for instance on its food plant. It is usually more convenient to assemble 

 the insects being experimented with in one place, the insectary. 



MOUNTING INSECTS. 

 All large insects should be pinned, using insect pins which should be in- 



